Calipers.



A. S. KOCH.

GALIPBRS.

APPLICATION FILED MAR.14, 190s.

I7'NESSES: INVENTOH BY Ma A TTOHNE Y3 PATENTED MAY 15, 1906.

TINID STATES PATENT ()FFICE. ALFRED s. KOGHiO F LANCASTER, PENNSYLVANIA.CALlPERSi.

Specification of Letters Patent.

Patented May 15, 1906.

Application fil d March 14, 1906. Serial No. 306,024-

To all whom it may concern.-

Be it known that I, ALFRED SAMUEL Koon, a citizen of the United States,and a resident of Lancaster, in the county of Lancaster and State ofPennsylvania, have invented new and Improved Calipers, of which thefollowing is a full, clear, and exact description.

This invention relates to improvements in calipers of the so-calledfigure-eight class employed by watchmakers in testing balance-wheels andother parts, the object being to provide a caliper of this class with anovel form of pointer and the means for mounting the pointer, whereby itmay be readily turned to one end or the other of the caliper and alsoturned from the plane of the caliper.

I will describe a caliper embodying my invention and then point out thenovel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a top plan view of a caliper embodying my invention. Fig. 2is a bottom plan thereof, and Fig. 3 is a section on the line m w ofFig. 2.

At one end the caliper has the usual bowshaped members 1 2, andsimilarly-shaped members 3 1 are at the other end. The arms or members 34 are made integral, as are also the arms or members 2 3, and theseintegral members are crossed. and pivotally connected at the center. Ashere shown the members are mounted to swing on a pivot-block 5,

having a flange 6, upon which one side of the members rest, while theother side is engaged by a plate 7, removably secured to the block 5 bymeans of a screw 8, extended from the block into a tappet perforation inthe plate 7. Mounted to rotate on a part of the block projected outwardfrom the flange 6 is a ring 9, which at one side is open, as indicatedat 10, so that the ring may be easily sprung over "said projection ofthe block, but held with sufficient friction to prevent its accidentalremoval. Extended from one side of the 5 ring 9 are lugs 11, and havingpivotal connection between the lugs is a pointer 12. The object, ofcourse, in so mounting the pointer is to permit its movement up and downrelatively to the plane of the caliper. The ends of the arms or calipermembers are provided with the usual devices for engaging with the workto be tested or trued up, the engaging devices at one side being ofcourse different from the engaging devices at the other end.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A caliper having arms at its op osite ends, the armat one end being integra with the opposite arm at the other end, apivotblock having a flange upon which the upper surfaces of the armmembers at the pivotal point engage, a plate detachably connected tosaid block and engaging upon the outer sides of said arm members at thepivotal point, said block having a projection outward from its flange, aspring-ring mounted to rotate on said projection, and a pointer havingswinging connection with the ring.

2. A caliper comprising crossed members, a pivot-block on which themembers are mounted to swing, a flange on said block for engaging withone side of said members, a plate re'movably attached to the block, forengaging with the other side of said members, a ring having swingingconnection with said block, lugs extended from one side of the ring, anda pointer mounted between said lugs, so as to have a swinging movementtoward and from the plane of the caliper.

3. The combination with caliper-arms of a pivot-block for the arms, thesaid pivot-block having an outward projection, a ring mounted to rotateon said projection, the said ring being open at one side whereby it maybe sprung over the projection, and for frictional engagement therewith,and a pointer mounted to swing on the ring.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALFRED S. KOCH. Witnesses S. B. Moonn, LEONARD L. LEWIS.

